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Observation of top quark production in proton-nucleus collisions


Abstract

The first observation of top quark production in proton-nucleus collisions is reported using proton-lead data collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of $\sqrt{s_{NN}}$ = 8.16 TeV. The measurement is performed using events with exactly one isolated electron or muon candidate and at least four jets. The data sample corresponds to an integrated luminosity of 174 $nb^{−1}$. The significance of the $t\overline{t}$ signal against the background-only hypothesis is above 5 standard deviations. The measured cross section is $\sigma_{t\overline{t}} = 45±8  nb$, consistent with predictions from perturbative quantum chromodynamics.

Abstract

The first observation of top quark production in proton-nucleus collisions is reported using proton-lead data collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of $\sqrt{s_{NN}}$ = 8.16 TeV. The measurement is performed using events with exactly one isolated electron or muon candidate and at least four jets. The data sample corresponds to an integrated luminosity of 174 $nb^{−1}$. The significance of the $t\overline{t}$ signal against the background-only hypothesis is above 5 standard deviations. The measured cross section is $\sigma_{t\overline{t}} = 45±8  nb$, consistent with predictions from perturbative quantum chromodynamics.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2017
Deposited On:08 Feb 2018 16:43
Last Modified:19 Feb 2018 10:46
Publisher:American Physical Society
ISSN:0031-9007
OA Status:Hybrid
Publisher DOI:https://doi.org/10.1103/PhysRevLett.119.242001

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